Home Categories Inorganic chemistry Hydroiodic acid
A4696512

Hydroiodic acid , 55.0-58.0%, containing ≤1.5%H3PO2 stabilizer , 10034-85-2

Synonym(s):
Hydriotic acid;Hydrogen iodide solution

CAS NO.:10034-85-2

Empirical Formula: HI

Molecular Weight: 127.91

MDL number: MFCD00011347

EINECS: 233-109-9

Update time: 2022-07-08

PRODUCT Properties

Melting point: -50.8°
Boiling point: 127 °C(lit.)
Density  1.96 g/mL at 20 °C
vapor pressure  721.8kPa at 20℃
Flash point: 126-127°C
storage temp.  2-8°C
solubility  very soluble in H2O; soluble in organic solvents
pka -10(at 25℃)
form  colorless or yellow gas
color  Colorless to brown
Odor Pungent odor
PH Range 1
PH 3.01(1 mM solution);2.04(10 mM solution);1.08(100 mM solution)
Water Solubility  soluble
Sensitive  Hygroscopic
Merck  14,4776
Dielectric constant 3.4(-50℃)
Exposure limits ACGIH: TWA 0.01 ppm
Stability: Stable. Incompatible with bases, amines. Corrodes steel. May discolour on exposure to air and light.

Description and Uses

‘Iodine’ is derived from iodes, a Greek word meaning violet. It is a member of the halide family and hydrogen iodide is considered a strong acid.

Reducing agent, manufacture of inorganic iodides, pharmaceuticals, disinfectants. The 57% acid is also used for analytical purposes, such as methoxyl determinations.

Safety

Symbol(GHS) 
GHS05,GHS09
Signal word  Danger
Hazard statements  H290-H314-H411
Precautionary statements  P234-P273-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338
Hazard Codes  C
Risk Statements  34-35
Safety Statements  26-36/37/39-45-9
RIDADR  UN 1787 8/PG 2
WGK Germany  -
RTECS  MW3760000
8
TSCA  Yes
HazardClass  8
PackingGroup  II
HS Code  28111990

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